Apparatus for rolling plate glass



sept. 26, G J ANAMEGHE APPARATUS FOR ROLLING PLATE GLASS Filed Oct. 6,1932 2 Sheets-Sheet l INVENTOR Sept. 26, 1933. G, J. NAMECHE APPARATUSFOR ROLLING PLATE GLASS 2 Sheets-Sheet 2 Filed OCT.. 5, 1932 INVENTORwww www

Patented Sept. 26, 1933.

VGus J. Nameche, Ford City, Pa., assignor to Pittsburgh lPlate GlassCompany, a ,corporation "of Y, Pennsylvania i Application october s,1932.y sea'lNt. 536,5054 s oiaims.- (ci. 49-3`3) TheV invention relatesto apparatus for rolling plate glass continuously from a tank, andhasfor its principal objects the provision of an improved construction-backof the forming or sizing rolls forvregulating'the" temperature of theglass and for cooling the upper formingv roll. A further object vis rtopromote the speed ofV rolling and improve'the quality of the glass byreducing the amount of ream'in the sheet produced., One 'embodiment oftheinvention is shown inthe accompanying drawings, wherein:

Fig. 1 is a vertical section on the line I-I of Fig. 2. And Fig. 2 -isafront elevation on the line II-II of Fig. 1. v

Referring to the drawings, 1 isv the front end of a glass melting tankpreferably of the'usual regenerative type; 2 is an extension of themelt- `ing tank; and 3 is a delivery pot with an outlet' v4 at itsvforward end, from which the glass is delivered between a pair of watercooled rolls 5,'5 driven by any suitable means, not shown. The glassdelivered between the rolls is formed 'into a ribbon 6 passing over therolls 'Iland through a roller leer, not shown. The extenlsion 2 and4delivery pot 3 are supported on 'a suitable underframing, including the'I-beams 8. Underneaththe delivery pot 3 is the usual Akiln 'f3aprovided with'suitable heating chambers and burners bymeans of which thedelivery pot is maintained at a proper temperature. i

The arch members 9v and 10 and the roof blocks 11 and .-12are'preferablysupported by the hollow water cooled'members 13, 13, etc.In order to provide for the cutting off of thesupply of glass 'from' theextension 2 to the deliverypot 3, the

' water cooled gate'or shear cake 14 is provided supported from above bymeans of chains 15 connected to an overhead crane whereby the gate maybe raised and loweredy when this `operation is required.

At the front"y end of the `delivery pot isalwall or closure,`often`referred to as a slot member made up vof a suitable metal frameworkcarrying clay' blocks which constitute thebody of the constituting theside walls of the slot. Mountedv above the slot and constituting the topwall thereof is the water cooled member 19. This member is hollow and isprovided with a pair of pipes 20 and v21 extending through its top wall,by Ymeansof which av circulation of water lis secured in orderV to. keepthe member at the desired Vteinperature. The member is adjustedvertically by means of a pair of rods 22 which extend through thecasting 16 and are threaded at theirupper ends'.

The lrods 22 'are hollow and carry the water pipes 20 and-21,fthe pipe2,0 being yconnected 'at its lower end to the perforatedpipe 20a lyingin the membe1y19,` and the p ipeh21`-v being connected to the perforatedpipe 21a,also

lying inside the member 19 (Fig. 2). .Upon these Athreaded-upper ends`are mounteda pair of worm wheels 23 which areseated upon thecasting 16and are driven by worms y24 onthe shaft 25,

Asuch shaft 25 having atzits'end a crank 26. By ,-.1 this means themember `19 may be raisedand lowered to'v any desiredposition.l Thecasing is securedj to the end of the tank by meansof thefrods'extendingv through theA perforations -in thev ylugs 16a (Fig. 2).4 y

member `19 isa shade I membery 27 of refractorymaterial, such as clay,

'f Backf of the water cooled also mounted for vertical adjustment so.that the cooling effect lof the member 19on'therbath-'of' glass back ofsuch member -may :be regulated, f1: fthel shade member being loweredwhenitis desired toreduce the cooling effectfof themember 19: upon theglass. Theshade memberis raised and lowered by means of a'pair of .rods28 which also extend upward through the casting yland Li are threadedthrough worm wheels 29, seated upon the top-of the casting;y These wormwheels are 'rotated by vmeans of a-pair of Aworms 30 Ycarried isvmountedupon a Ypair of screws33-which are moved up and down by worm wheels 34,such worm wheels being operatedby worms 35 carried-1 by the shaft 36.The shaft-36 is rotated by means of thefcra'nk 37 at one end thereof.:The metal `framework and the-parts carried,therebygarearwall or member.As indicated in the drawings,.

ranged to be removed bodily when replacement loo f or repair `isnecessary, this being accomplished-ij by the chains 38 secured to'lugs39 on the casting and attached at their upper ends to an overhead cranewhich is not shown. The triangular spaces at the ends of the rolls 5, 5are closed by the usual metal members 40 (Fig. 2), referred to intheart''f as guns and preferably heated by gas burners asis well known inthe art. i

The provision of the water cooled member 19 uponthe shaft31,vsuch.snaftbeing rotated `by I means of the'crank 32. 1

immediately back of the upper sizing roll 5 gives 110 stone 27 permitsof aY regulation of the cooling eifect of the member 19 upon the glassinthe delivery pot.. If desired thewatei"vv cooled member 19 may be usedas a .cut-off gate to stop the fiow of glass to the sizing'krolls shouldthis become necessary. The cooling member alsoV increases the viscosityof the glass flowing through the outlet 4 so that practically all theglass owing over the clay lip passes into the sheet and the amount ofexcess or push back glass is reduced vto amninum.' This is `afdesirablecondition as theY -quality of the glass is improved in comparison withother arrangements `'cannot be produced.

What I'claim is: v Y il; The combination with a tank adapted. to carry abath of moltenglass, and a pair of sizing rolls at one end thereof forforming'sa sheet or ribbon of glass, of a slot member between the y bathand rolls comprising a refractory wall constituting the bottom and sidewalls of the outlet l"slot, a metalframeworksupporting the refracutorywall, and a hollow water cooled member mounted for vertical movement inthe framework A vand constituting the upper wall of the outlet slot. 2.The combination with aV tank adapted to car-` ry a bath of molten glass,and a pair of sizing rolls 1at one end thereof for forming a sheet orribbon Apf glass, of a rslot member between the bath `and rollscomprising a refractory wall constituting the bottom and side Walls ofthe outlet slotf'a metal 'lramewo'rk supporting the refractorywall, ahol` lowr water cooled member mounted ,for Vertical movement in theframework and vconstituting the upper wall of the slot member, andashade member of refractory material back of the water cooled member and'also mounted for vertical movement in the framework. Y Y

`Ia metal framework supporting the refractory wall, a hollow watercooled member mounted vfor vertical movement in the framework andconstituting the upper 'wall of the outlet slot, `and 'means foradjusting the framework vertically. A

4. The combination.- with a tank adapted to carry a Vbath of moltenglass, landa pair of sizing rolls at one end thereof for forming -asheet or ribbon of glass, of a slot member between the bath and rollscomprising a refractory wall conwhere thisY condition carry a bath ofmoltenglass, and a pair of sizing stituting the bottom and side wallsofv the outlet slot, a metal framework supporting the refractory wall, ahollow water cooled lmember mounted for vertical movement in theframework and constituting the upper wall of thev slot member, meansrfor adjusting the vframework. vertically,

anda shade member of refractoryrmaterial back y of the water cooledmember and also mounted A for vertical movement inthe framework.

5. The combination with a tank adapted to carry a bath of molten glass,and a pair of sizing rolls at one end 'thereof for forming a vsheet orribbon of glass, of a slot member between the bath and rolls Comprisinga refractory wall contituti'ng the bottom Yand sidewalls of the outletslot,V a metal framework supporting the refractory wallyand a`lflollow-water cooled member mounted y for vertical movement in thevframework just to the .rear of the upper of saidrollsLand in ver- 'ticalalignment with theKV bottom wall of the slot, and constituting the upperwall ofthe outlet slot.

6. The combination wit'hfa tank adapted to rolls atrone end 'thereof forforming a sheet or ribbon of glass', of closure means for the end of thetank back of the rolls comprising a framehollow water cooled gate memberconstituting km5 the upper wall of the slot mounted for verticalmovement in the framework and adapted in its lowermost position to outoff the lnew of glass through the slot.

7. The combination with a 4tank;adapted to 'i110' carry a bath 4ofmoltenglass, and a pair of .sizing rolls at one'. end thereof` forforming a sheet'zor ribbon of glassgof -a slot mem-ber between theb'athand rolls comprisinga refractory wall constituting v the bottom Iandside walls of the loutlet slot, Ta metal frameworksupporting ltherefractory wall, a hollow iwater'cooled member mounted 'for verticalmovement `in the framework and constituting the Vupper wallof theoutlet' slot, and meansg- .carried by the framework for adjusting thewater T20 cooled ymember VertieallyQV I v 8. Thegcombination with v`atank adapted to carry abath of molten glass, and a pai-r of sizing rollsat'one end Ithereof lfor forming Va sheet orfff ribbon of `glass, -of aslot member between 'the bat-hand rolls comprising a refractory. wallconstituting lthe lbottom and side walls ofthe outlet Y slot, a Imetalframework supporting the-:refractory wall, a hol-low Awater cooledmember kmounted for i ver-tical -rnovement in the Aframework and con- 1stituting the upper wall of the slot member, a shade member vofrefractory material backI of the water cooled member andv-alsoAmountedffor ver-

